what type of coolant do I need for my 2004 3.7 v6 auto?? The coolant I drained was orange/red, but the stuff the guy at advanced auto pointed me to is green (it is advanced auto extended life coolant)...any help?

read the instructions if it says it's compatible with orange coolant or extended life. most antifreeze companies make it universal now a days

Zerex G-05 is orange. If memory serves me correctly, that's what I used in my 2000 3.9

i read once about a guy that put marvel mystery oil in the coolant, to stop rust, he used 5 OZ. i would use 10 OZ. i have not used it, yet.

don't put anything in there except antifreeze and water. most new antifreeze is yellow green and will work with what ever color antifreeze you have in the engine